Remcaprep register (05h), Socav register (0eh), Remcapav register (1fh) – Rainbow Electronics MAX17047 User Manual
Page 16: Figure 12. remcap register format (outpu, Figure 13. soc register format (output), Figure 14. remcap register format (outpu
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MAX17047
ModelGauge m3 Fuel Gauge
RemCap
REP
Register (05h)
RemCap
REP
is a filtered version of the RemCap
AV
register
that prevents large jumps in the reported value caused by
changes in the application such as abrupt changes in load
current. The value is stored in terms of FVh and must be
divided by the application sense-resistor value to determine
remaining capacity in mAh. During application idle periods
where the AverageCurrent Register value is less than Q6
LSbs, RemCap
REP
does not change. The measured cur-
rent during this period is still accumulated into RemCap
MIX
and is slowly reflected in RemCap
REP
once cell loading or
REP
register
format.
SOC
AV
Register (0Eh)
The SOC
AV
register holds the calculated present state
of charge of the cell based on all inputs from the
ModelGauge m3 algorithm including empty compensa-
tion. The register value is stored as a percentage with a
resolution of 0.0039% per LSb. If an 8-bit state-of-charge
value is desired, the host can discard the lower byte and
use only the upper byte of the register with a resolution of
1.0%. The SOC
AV
register value is an unfiltered calcula-
tion. Jumps in the value can be caused by changes in
the application such as abrupt changes in load current.
AV
register format.
RemCap
AV
Register (1Fh)
The RemCap
AV
register holds the calculated remain-
ing capacity of the cell based on all inputs from the
ModelGauge m3 algorithm including empty compen-
sation. The value is stored in terms of FVh and must
be divided by the application sense-resistor value to
determine the remaining capacity in mAh. The register
value is an unfiltered calculation. Jumps in the value can
be caused by changes in the application such as abrupt
changes in load current.
shows the RemCap
AV
register format.
Figure 13. SOC
AV
Register Format (Output)
Figure 14. RemCap
AV
Register Format (Output)
Figure 12. RemCap
REP
Register Format (Output)
MSB—ADDRESS 0Eh
LSB—ADDRESS 0Eh
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
MSb
LSb
MSb
LSb
2
-8
UNITS: 0.0039%
2
0
UNITS: 1.0%
MSB—ADDRESS 1Fh
LSB—ADDRESS 1Fh
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSb
LSb
MSb
LSb
2
0
UNITS: 5.0FVh/R
SENSE
(0.5mAh WHEN R
SENSE
= 0.010I)
MSB—ADDRESS 05h
LSB—ADDRESS 05h
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
MSb
LSb
MSb
LSb
2
0
UNITS: 5.0FVh/R
SENSE
(0.5mAh WHEN R
SENSE
= 0.010I)